diff --git a/source/games/duke/CMakeLists.txt b/source/games/duke/CMakeLists.txt
index c406436b9..a9bbc8743 100644
--- a/source/games/duke/CMakeLists.txt
+++ b/source/games/duke/CMakeLists.txt
@@ -31,7 +31,7 @@ set( PCH_SOURCES
 	src/premap.cpp
 	src/premap_d.cpp
 	src/premap_r.cpp
-	src/ror.cpp
+	src/render.cpp
 	src/sbar.cpp
 	src/sbar_d.cpp
 	src/sbar_r.cpp
diff --git a/source/games/duke/src/game.h b/source/games/duke/src/game.h
index 9b92374c0..ef5470e16 100644
--- a/source/games/duke/src/game.h
+++ b/source/games/duke/src/game.h
@@ -234,7 +234,7 @@ void G_DisplayRest(int32_t smoothratio);
 void drawbackground(void);
 void G_DrawFrags(void);
 void G_HandleMirror(int32_t x, int32_t y, int32_t z, fix16_t a, fix16_t horiz, int32_t smoothratio);
-void G_DrawRooms(int32_t playerNum,int32_t smoothratio);
+void displayrooms(int32_t playerNum,int32_t smoothratio);
 void G_DrawTXDigiNumZ(int32_t starttile,int32_t x,int32_t y,int32_t n,int32_t s,int32_t pal,int32_t cs,int32_t x1,int32_t y1,int32_t x2,int32_t y2,int32_t z);
 void G_HandleLocalKeys(void);
 void G_UpdatePlayerFromMenu(void);
diff --git a/source/games/duke/src/ror.cpp b/source/games/duke/src/render.cpp
similarity index 98%
rename from source/games/duke/src/ror.cpp
rename to source/games/duke/src/render.cpp
index 40da5f451..ebaa150c4 100644
--- a/source/games/duke/src/ror.cpp
+++ b/source/games/duke/src/render.cpp
@@ -218,7 +218,7 @@ void renderMirror(int cposx, int cposy, int cposz, int cang, int choriz, int smo
 
 		if (wall[mirrorwall[i]].overpicnum == TILE_MIRROR)
 		{
-			int tposx, tposy, tposz, tang;
+			int tposx, tposy, tang;
 
 			renderPrepareMirror(cposx, cposy, cposz, cang << FRACBITS, choriz<<FRACBITS, mirrorwall[i], &tposx, &tposy, &tang);
 
@@ -461,14 +461,12 @@ static void geometryEffect(int cposx, int cposy, int cposz, int cang, int choriz
 //
 //---------------------------------------------------------------------------
 
-void displayrooms(short snum, int smoothratio)
+void displayrooms(int snum, int smoothratio)
 {
-	int cposx, cposy, cposz, dst, j, fz, cz, hz, lz;
-	short sect, cang, k, choriz, tsect;
+	int cposx, cposy, cposz, fz, cz;
+	short sect, cang, choriz;
 	struct player_struct* p;
-	int dx, dy, thoriz, i;
-	short tang;
-	int tiltcx, tiltcy, tiltcs = 0; // JBF 20030807
+	int tiltcs = 0; // JBF 20030807
 
 	p = &ps[snum];